It sounds like crude science fiction: Inject the blood of the young to transform into a more youthful, healthier you.

But a new health trend involving the transfusion of teen blood is turning B-movie material into reality, and it’s spurring an industry eager on selling the experimental treatment to willing, aging customers — whether it works or not.

At Ambrosia’s clinics in San Francisco and Tampa, the aging and wrinkled are receiving what founder Dr. Jesse Karmazin simply refers to as a “young blood treatment.”